Requesting help for answer to 'Model a simple plane into steps'
Blender can do this in one, using the AltV Rip Fill operator, with (in this case,) Z to constrain the direction of the extruded fill. (3DS can do this too, so some of the steps in the reference video to the other Q. are not strictly necessary)
There are a couple of gotchas.

Rip Fill works only on edges between faces.
The side of the edge-selection the mouse is on, before execution, matters. The new fill-face is extruded on the far side of the edge, with respect to the mouse.

With Snap set to 'Vertex' and 'Active', and working in an orthogonal view to ensure the mouse is on the right side of the loop selection: